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ADS1110 16-Bit I2C ADC

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by Ray

16-bit self-calibrating delta-sigma ADC with I2C, onboard reference and PGA.

adcdelta-sigma16-biti2cpgatisot-23-6
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ADS1110

Texas Instruments · Analog-to-Digital Converter · SOT-23-6

The ADS1110 is a 16-bit self-calibrating delta-sigma analog-to-digital converter with an I2C interface. It integrates a 2.048 V reference and a programmable gain amplifier (1x to 8x), converting a single differential input at selectable data rates and resolution up to 16 bits. Its SOT-23-6 package suits compact precision measurement.

Pinout

Pin Name Type Function
1 VIN+ input Non-inverting analog input of the differential ADC. Full-scale differential range is +/-2.048V/PGA; absolute voltage must remain within GND-0.2V to VDD+0.2V. Common-mode input impedance depends on PGA (0.9-3.5 MOhm); differential input impedance is 2.8 MOhm/PGA.
2 GND power_in Ground return for analog and digital supply. VDD-to-GND absolute maximum is -0.3V to +6V.
3 SCL input I2C serial clock input. Open-drain, driven by the master; the ADS1110 never drives SCL (it acts as an I2C slave only). Requires an external pull-up resistor. Supports Standard (100 kHz), Fast (400 kHz), and High-speed (up to 3.4 MHz) modes. Absolute maximum voltage to GND: -0.5V to 6V.
4 SDA bidirectional I2C serial data line, bidirectional open-drain. Requires an external pull-up resistor. VOL = 0.4V max at IOL = 3 mA. Absolute maximum voltage to GND: -0.5V to 6V.
5 VDD power_in Positive power-supply input. Operating range 2.7V to 5.5V (absolute max 6V). Typical supply current 240 uA active, 0.05 uA in power-down. Bypass with a local ceramic decoupling capacitor to GND.
6 VIN- input Inverting analog input of the differential ADC. Full-scale differential range is +/-2.048V/PGA; absolute voltage must remain within GND-0.2V to VDD+0.2V. Do not drive below -200 mV in differential mode.

Key specifications

Parameter Value
Resolution 12/14/15/16-bit (rate dependent)
Architecture Delta-sigma, self-calibrating
Inputs 1 differential
Reference Internal 2.048 V
PGA gain 1x, 2x, 4x, 8x
Interface I2C
Supply voltage 2.7 V to 5.5 V
Operating temperature -40 C to 85 C

Ordering variants

  • ADS1110IDBVT
  • ADS1110IDBVR
  • ADS1110A0IDBVT
  • ADS1110A0IDBVR
  • ADS1110A1IDBVT
  • ADS1110A1IDBVR
  • ADS1110A2IDBVT
  • ADS1110A2IDBVR
  • ADS1110A3IDBVT
  • ADS1110A3IDBVR
  • ADS1110A4IDBVT
  • ADS1110A4IDBVR
  • ADS1110A5IDBVT
  • ADS1110A5IDBVR
  • ADS1110A6IDBVT
  • ADS1110A6IDBVR
  • ADS1110A7IDBVT
  • ADS1110A7IDBVR

CAD (KiCad official)

  • Symbol: ads1110.kicad_sym
  • Footprint: ads1110.kicad_mod
  • 3D model: SOT-23-6 body from KiCad Package_TO_SOT_SMD/SOT-23-6.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (26 pp, sha256 1e15543d347dbf9e, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF